SSQ Riverstone Exclusive Natural Slate The Rock Phyllite strong durable similar to slate with courser grain. Superior slip resistance, especially on wet surfaces. Origin La Represa quarry Argentina. Application: interior & exterior flooring | patio's | pathways Architecture Bespoke: sills | skirtings | stair treads | wall cladding Bespoke Slabs: cut to size maximum 3.5mtr. x 1.5mtr. Quality Control: complies with all British and European standard requirements. Rocksrus north east of England supplier of SSQ Riverstone. telephone: 01429 837424 | email enquiry